package com.mright.shop.manager.common.utils;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Random;

/**
 * @author : zhaochuanzhen
 * @description :
 * @date : 2020/7/29 14:18
 */
public class VerifyCode {

    // 生成验证码图片的宽度
    private int width = 100;

    // 生成验证码图片的高度
    private int height = 50;

    private String[] fontNames = {
            "宋体",
            "楷体",
            "隶书",
            "微软雅黑"};

    // 定义验证码图片的背景颜色为白色
    private Color bgColor = new Color(255, 255, 255);

    private Random random = new Random();

    private

    String codes = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

    private String text;
// 记录随机字符串

    /**
     * 获取一个随意颜色
     *
     * @return
     */
    private Color randomColor() {
        int red = random.nextInt(150);
        int green = random.nextInt(150);
        int blue = random.nextInt(150);
        return new Color(red, green, blue);
    }


    /**
     * 获取一个随机字体
     *
     * @return
     */
    private Font randomFont() {
        String name = fontNames[random.nextInt(fontNames.length)];

        int style = random.nextInt(4);

        int size = random.nextInt(5) + 24;


        return new Font(name, style, size);
    }


    /**
     * 获取一个随机字符
     *
     * @return
     */
    private char randomChar() {
        return codes.charAt(random.nextInt(codes.length()));
    }


    /**
     * 创建一个空白的BufferedImage对象
     *
     * @return
     */


    private BufferedImage createImage() {
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

        Graphics2D g2 = (Graphics2D) image.getGraphics();

        g2.setColor(bgColor);
// 设置验证码图片的背景颜色

        g2.fillRect(0, 0, width, height);

        return image;
    }


    public BufferedImage getImage() {
        BufferedImage image = createImage();

        Graphics2D g2 = (Graphics2D) image.getGraphics();

        StringBuffer sb = new StringBuffer();

        for (int i = 0; i < 4; i++) {
            String s = randomChar() + "";
            sb.append(s);
            g2.setColor(randomColor());
            g2.setFont(randomFont());
            float x = i * width * 1.0f / 4;
            g2.drawString(s, x, height - 15);
        }

        this.text = sb.toString();
        drawLine(image);
        return image;
    }


    /**
     * 绘制干扰线
     *
     * @param image
     */
    private void drawLine(BufferedImage image) {
        Graphics2D g2 = (Graphics2D) image.getGraphics();

        int num = 5;
        for (int i = 0; i < num; i++) {
            int x1 = random.nextInt(width);


            int y1 = random.nextInt(height);

            int x2 = random.nextInt(width);


            int y2 = random.nextInt(height);

            g2.setColor(randomColor());
            g2.setStroke(new BasicStroke(1.5f));
            g2.drawLine(x1, y1, x2, y2);
        }
    }

    public String getText() {
        return text;
    }

    public static void output(BufferedImage image, OutputStream out)
            throws
            IOException {
        ImageIO.write(image, "JPEG", out);
    }
}
